Sash-balance.



PATE'NTBD MAY 24. 1904.

' APPLICATION 11mm) JAN, 16, 190;.

I n we ntor.

VV itnesses UNITED STATES Patented May 24,

PATENT OFFICE.

SASH-BALANCE.

SPECIFICATION forming part of Letters Patent No. 760,788, dated May 24, 1904.

Application filed 1mm 16, 1903'. Serial No. 139,363, (no model.)

' dent of Providence, in the county of Provisaid window-frame.

dence and State of Rhode Island, have invented certain new and useful Improvements in Sheet-Metal Window-Frames; and 'I do.here.

by declare that the following is. a full,clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to the construction of metal window frames and sashes, and has for its object to produce simple and practical means for attaching a spring-balance lock to a metal window-frame, also for attachingto the window-sash the means for operating said spring-balance.

It is-fully described in thisspecification and illustrated in the accompanying drawings.

Figure 1 represents the metal frame and Fig. 2 is a sectional elevation of the frame .and sash on line 2 2 of Fig. 4, showing the devices as set in the frame, also the rack in the sash. Fig. 3 is'a front view of a portion of the frame, showing the apertures and frame countersunk to receive the balance-lock. Fig. 4: is a sectional plan view of the frame and sash on line 3 3 of Fig. 2, showing a pair of the devices as set into the window-frame, also the rack set into the sash. Fig. 5 is a perspective view of a portion of the supportingframe or'reinforcing-piece for holding the spring-balance casing to the metal frame, also the supporting-shoes attached .to the back of Fig. 6 is a perspective View of'a portion of the window-sash, showing the score or recess which receives the rack that engages the gear on the spring-balance. Fig. 7 is a perspective view of a por tion of the rack. Fig. 8 is a modification of the metal window-sash, showing the metal in the back of said sash as punched out, forming in any desired position. There are usually two of these devices to each sash, one on each side, two for the upper and two for thelower sash. Each device isinserted into anaperture e 0 made in the metal window-frame E to receive it. The outwardly-extending ears a a are for the purpose of receiving the countersunk heads of the screws or bolts Z) 5, which bolts pass through the holes t' z' in the frame and may be tapped into or otherwise fastened to the reinforcing-piece D underneath. Said ears are countersunk or let in flush with the jamb at f f. Thisreinforcingandsupporting frame D is placed on the inner side of the hollow sheet-metal window-frame to surround and support a pair of balance-locks A A, and it is held in place by the bolts 5 b, which are screwed into it, and may be made of any suitable material. porting-frame D are raised ribs 02 (Z. The middle section of the frame is alsoraised and cut out underneath at 9, so as to fit over the required form of the window frame, thus forming raised portions on each side of the locking devices for giving to them additional support.

Riveted into the removable back Gr of the window-frame E are shoes it h, cupped out or made in a form to receivev and inclose the outer end of the balance-block device A A, thereby supporting their ends and holding them firmly in place. The rack C (a portion of which is shown in perspective in Fig. 7) is for the purpose of engaging the teeth of the spring-gear F in the balance device A. This rack C is set in the recess 0 in the window-sash B, where it is fastened in place.

Fig. 8 shows a modificationv of the metal Window-sash and rack, representing a combinotion of both in one by constructing the back side of said sash with a series of holespunched out of the sheet metal to receive the teeth of the gear F.

Heretofore it has been found very difficult to attach a spring-balance device to metal On the side of this supwindow-frames; but by my method as above described a device of this character may be attached in a very simple, practical, and secure manner.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

device.

2. The combination with a sheet-metal window-frame, of a reinforcing-block mounted in said frame and provided with a central raised portion and spaeed apart ribs in juxtaposition with the latter, balancing devices mounted at their forward ends between said raised portion and ribs, and independent means mounted in said frame for supporting the rear ends of said balancing devices.

3. The combination with a sheet-metal windowframe,'of a balancing device set therein,

a slotted reinforcing-block mounted in said frame and embracing said balancing device, and a shoe attached to the back of said win' dow-frame and having flanges for supporting the rear end of said balancing device.

In testimony whereof I have hereunto set my hand this 14th day of January, A. D. 1903.

CLAYTON HARRIS.

In presence of CHAS. PJDAY,

HOWARD E. BARLOW. 

